@eeeefarm:
PPM? (Persistent pupillary membranes)
Would not be PPM. PPM is visable when they open their eyes at birth. Even with very heavy PPM, it looks like a spider web in the eye.. not a spot. Heavy PPM at birth (when they open their eyes make the eye look blue as it is a sheeting over the eye. As the eye grows, the PPM doesn't, it sort of like a rubber band that pulls and breaks, but heavy PPM is still visable to the naked eye. But again at his age, it would really just look like a spider web. Since PPM is there from the time they open their eyes, you would have seen it way before now if it was still causing a clouding of the eye.
Could be many things, Cataracts come to mind even at this age. That is why best to have it check by a board certified Ophthalmologists